From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E972316F831 for ; Tue, 28 May 2024 14:10:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716905406; cv=none; b=sWMJ0U1hMqxXYz+xbGGBZlMiDVG/SIHclJ6JVss3hSw+yEmSTXdZyb1Bmx/CWysN0ltDetxRiNTwwNrf9I6rGspUTUiO4z/4YtD9xirLplAl6uIOfG5iyhh/EGp+wLMrcdxnU/2jIgNgihW28V0wWdFyjUkHoyBBJReFVvPQis0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716905406; c=relaxed/simple; bh=h/gURcyiroXERc30tAsjPBSZVuF3pg0jAqJbgtbiT0k=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=nt8Y91yabYxZHp5mBzptNoce/APV+FXZBlPhEMK09RCXbIS+rOnQ8EbLuMPCHhx7vVw5joZRfDwvyoGmbPYyM8MHzYcnFe+jjRwreC6FHFHFCfqJE2tWX9WUVt5+rweTTL/DnKA79qHqev2r0AET4L0y6OZButBIRiMcBi6dOYE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.198 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f198.google.com with SMTP id e9e14a558f8ab-3742c0af134so7060255ab.1 for ; Tue, 28 May 2024 07:10:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716905404; x=1717510204; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=WelPM0YOgva6j7b8RyCxFfD+qVIUmvNqXXrqPoDhdgY=; b=qonlXN2CmtH83KKamC2hmB1H+GfpvAS/2bBVKZ5LnKAnBoiHE97nGAPc0hVNB6y6Fj riU2SKfQLOV6x3DJnGIwM8JRnBy6B8PnSDJ+kYuorXfjGSRTNt0IKBn1c8ZBMsnhVz8u Feaf7e9te6hTS+CCziXSHs8YEMY+x0eG157CpEMRIJ23xYYttqc8OWa/d7vcfiVvnMeh SABf83SjbvMQqNEogK9ZT4Tv2qgJ1vBe/8aHLjLKFi7jpWhgnWD6kkkWUfc4IjCldj23 TA1ec8KG/yfEC2V4H51vIiEvtuSnfiHRGHvIpUtsxK1PKsKiMfGrnFo8chtxc8AxpVpn tBPg== X-Forwarded-Encrypted: i=1; AJvYcCWBcR/QyuqXKane+jyQquulxmd+G5SPffJycexiOzelIRB+6eU8ZxKxbSY077Z16l7/t/BnXqf8RtOE/i4T2kJQCb1Vy8x3 X-Gm-Message-State: AOJu0Yyxhl0YiR9bVYlCec9z0fPbwSPNoSH7xB4jpLx+c+reoGnsxCIZ PijVXk/NLH5GsymK9wOCjle8PVf66I4r0AznQDyvpbitQx38uPSjNlBCErfrrqVsQ9wvXeO5ZGB 8cvuCUkvCBeWuUoJPfqmVOnmWEZ6TEXcPLNXDz7D+73nlcEQdYpXTeIM= X-Google-Smtp-Source: AGHT+IGYxSLRdYdSIj6V1X50DGPsuaMd0GZg6XGsMCIH/LkK6jYr0HVeJzFN9W0DOKbFyaxhbmGnpo9uLKXYNy7mw6IEfD9syljH Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2188:b0:374:491c:654a with SMTP id e9e14a558f8ab-374491c6dd3mr3454075ab.1.1716905404172; Tue, 28 May 2024 07:10:04 -0700 (PDT) Date: Tue, 28 May 2024 07:10:04 -0700 In-Reply-To: <0000000000004fa7ab061966d1b3@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ba9d9b06198430d3@google.com> Subject: Re: [syzbot] [bpf?] possible deadlock in __lock_task_sighand (3) From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, clang-built-linux@googlegroups.com, daniel@iogearbox.net, davem@davemloft.net, eddyz87@gmail.com, haoluo@google.com, hawk@kernel.org, john.fastabend@gmail.com, jolsa@kernel.org, kafai@fb.com, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, martin.lau@linux.dev, mingo@redhat.com, nathan@kernel.org, ndesaulniers@google.com, netdev@vger.kernel.org, rostedt@goodmis.org, sdf@google.com, song@kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, yhs@fb.com, yonghong.song@linux.dev Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit fbd94c7afcf99c9f3b1ba1168657ecc428eb2c8d Author: Alexei Starovoitov Date: Wed Dec 1 18:10:28 2021 +0000 bpf: Pass a set of bpf_core_relo-s to prog_load command. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=149b9a2c980000 start commit: 30a92c9e3d6b openvswitch: Set the skbuff pkt_type for prop.. git tree: net final oops: https://syzkaller.appspot.com/x/report.txt?x=169b9a2c980000 console output: https://syzkaller.appspot.com/x/log.txt?x=129b9a2c980000 kernel config: https://syzkaller.appspot.com/x/.config?x=17ffd15f654c98ba dashboard link: https://syzkaller.appspot.com/bug?extid=f2ed7d5888894fedf676 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16c203f0980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12046634980000 Reported-by: syzbot+f2ed7d5888894fedf676@syzkaller.appspotmail.com Fixes: fbd94c7afcf9 ("bpf: Pass a set of bpf_core_relo-s to prog_load command.") For information about bisection process see: https://goo.gl/tpsmEJ#bisection